Permutations & Combinations Tutorials - Total Ways to Write 4 Letter Word ROSE

Permutations & Combinations Tutorials - Learn total ways to write 4 letter word ROSE, with our without meaning, where repetition of letters are not allowed. To solve these type of permutations & combination math chapter's question, we have to method-
1. Using Fundamental Principle of Counting
2. Use Permutation Formula

In this video tutorial, we use 1st method to solve this question. There can be created so many different 4 letter words with or without meaning from letters R , O, S, E.

While solving this question, we can write the first letter in 4 ways, since repetition is not allowed , the second letter can be written in 3 ways, similarly, 3 letter can be written in 2 ways and then last one in 1 ways, which ultimately, gives us total 4.3.2.1 = 24 ways to write the 4 letter word from letters of ROSE.

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If you have any doubt or question to ask about above video lesson about solving factorials then please feel free to ask in comment section below.

Please feel free to comment and suggest us !

[bhuvaneshsekar]

you are the good teacher i ever had... Thanks bro...

[jayasaravanan]

Don't we have to multiply it again by 4! because the question asks 'formed'..so doesnt that mean arrangement?

[harivigneshs]

if i learn these 24 videos the total permutation and combination will be completed ? or is there anything more if ther eis more than this where can i learn?

[dompham.]

all you need left is an english teacher! ;D haha

[ahmadsoughar]

What is the probability that if 15 letters are typed, no letters are repeated?